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ICE EFFECTS ON STREAMFLOW
The formation of ice on rivers can cause discharge values to appear unusually high. Display of these erroneous discharge data may result in improper assessment of flow conditions and misuse of the data. For this reason, display of discharge values for streams significantly affected by ice may be disabled from view. Display of discharge data will resume when ice conditions are no longer present. Discharge values for streams minimally affected by ice will continue to be displayed. Flows for streams with these conditions appear to increase during the night and decrease to near-base-line conditions around midday. To estimate the correct discharge for these streams, use the flow rate that corresponds to the bottom of the discharge curve, rather than the peak that corresponds to the top of the curve. Note that this method of estimation is possible only when no surface runoff is occurring. Daily mean discharges for periods of both significant and minimal ice-effect will be estimated and published in the Annual Water-Data Report for the water year in which they occurred.
LOCATION--Lat 42°42'32", long 73°11'50",
Berkshire County, Hydrologic Unit 02020003, on left bank 0.1 mi
upstream from bridge on State Highway 2 at Williamstown and 0.8 mi
upstream from mouth.
DRAINAGE AREA--42.6 mi2.
PERIOD OF RECORD--Discharge: September 1949 to current year.
Water-quality records: Water years 1967–69.
GAGE--Data Collection Platform with satellite telemeter. Datum of gage is 615 ft above National Geodetic Vertical Datum of 1929, and 610.55 ft above North American Vertical Datum of 1988.
COOPERATION BY--Massachusetts Department of Conservation and Recreation, Office of Water Resources.
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Value May 16